JPS637567Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air spring device used in a railway vehicle.

[Conventional technology]

A conventional example of this type of air spring device will be described below with reference to FIG.

In FIG. 2, 4 is an air spring, 5 is a height adjustment valve, and 6 is a pressurized air source. The air spring 4 has a spring chamber 8 formed in a diaphragm 7 made of a flexible material.
and an auxiliary chamber 10 formed adjacent to the spring chamber 8 and connected to the spring chamber 8 via a passage 9. The height adjustment valve 5 has a primary port 5 connected to a pressure air source 6.
a, a secondary port 5b connected to the spring chamber 8, and an exhaust port 5c open to the atmosphere.

When a running vehicle stops at a station and the vehicle load decreases as passengers alight, the height adjustment valve 5 operates to exhaust air, and the pressurized air in the spring chamber 8 and auxiliary chamber 10 is transferred to its secondary port 5b and exhaust port 5c. is emitted into the atmosphere through
When the air pressure inside the air spring 4 decreases to a value corresponding to the vehicle load at that time, the exhaust is stopped.

After that, when the vehicle load increases due to the boarding of other passengers, the height adjustment valve 5 operates to supply air, and pressurized air from the pressurized air source 6 is supplied to the spring chamber 8 and the auxiliary through the primary port 5a and secondary port 5b. Air is supplied to the chamber 10, and when the air pressure within the air spring 4 rises to a value corresponding to the vehicle load at that time, the air supply is stopped.

By the supply/exhaust operation and stopping of the height adjustment valve 5, the height of the air spring 4, that is, the height of the vehicle body, is adjusted to a substantially constant level, and the height of the entrance/exit to the platform is maintained substantially constant while the vehicle is stopped. At the same time,
This improves the ride comfort when the vehicle is running.

[Problem that the invention attempts to solve]

A vehicle equipped with this air spring device stops at a station,
In this air spring device, when a passenger gets off the vehicle and then gets on the vehicle, the pressure air in the air spring 4 is first discharged from the height adjustment valve 5 to lower the pressure. Next, when another passenger gets on board, the air spring 4 is released from the height adjustment valve 5.
supply pressurized air to increase its pressure. This discharge and supply of pressurized air is performed not only to the spring chamber 8 but also to the auxiliary chamber 10, so the consumption of pressurized air increases during changes in vehicle load, and when passengers are getting on and off frequently. Consumption is significant.

[Means for solving problems]

Therefore, the technical means of the present invention for solving the above problem is that in the above conventional air spring device for a vehicle,
A 2-port, 2-position switching valve having a blocking position that shuts off two ports in response to an opening signal from a vehicle entrance/exit door, and a communicating position that communicates between the two ports in response to a closing signal from the door. 2 of this switching valve
One of the ports is connected to the spring chamber, and the other is connected to the auxiliary chamber.

[Effect]

According to this technical means, when a vehicle stops at a station and the entrance/exit door is opened, the switching valve is switched to the block position by the opening signal, so that the air spring is connected between the two ports of the switching valve. The spring chamber and the auxiliary chamber are cut off, and this cutoff state is maintained until a signal to close the entrance door is issued.

Therefore, during disembarkation of passengers and subsequent boarding of other passengers, i.e., during changes in vehicle load, pressurized air is discharged and supplied only to the spring chamber, and is not supplied to or discharged from the auxiliary chamber. .

When passengers finish boarding and alighting and the entrance door is closed, the switching valve returns to the communication position in response to the closing signal, so the two ports of this switching valve, that is, the auxiliary chamber and the spring chamber, communicate with each other. However, after the passenger has finished getting on and off the vehicle, that is, after the vehicle load has been determined, air supply and exhaust are also carried out to the auxiliary chamber.

〔Example〕

Hereinafter, an embodiment of the present invention will be described based on FIG. Regarding the same components as before,
The same reference numerals as in FIG. 2 are used to omit the explanation.

In FIG. 1, reference numeral 11 is a solenoid valve that is a two-port, two-position switching valve, and is provided in a passage 9 that connects the spring chamber 8 and the auxiliary chamber 10. That is, this solenoid valve 11 has a block position 11a that blocks two ports and a communication position 11b that communicates between the two ports, one of which is connected to the spring chamber 8 and the other is connected to the auxiliary chamber 10. Connect to. Also,
This solenoid valve 11 is used to turn the door switch 12 ON and OFF.
It is starting to switch over. door switch 1
2 is an existing switch that is installed in the driver's cab of the vehicle and is used as a conductor. This door switch 12
ON is the opening signal for the entrance/exit door, and the switch 12
OFF is the closing signal for the entrance/exit door.

When a moving vehicle stops at a station and the door switch 12 is turned on to open the boarding/exit door, that is, when a door open signal is issued, the solenoid valve 11 is energized and switched to the block position 11a. , auxiliary room 1
0 is isolated from the spring chamber 8.

In this shut-off state, when passengers get off the vehicle and the vehicle load decreases, the height adjustment valve 5 operates to exhaust air, and only the inside of the spring chamber 8 is exhausted, so that the air pressure in the spring chamber 8 changes to match the vehicle load at that time. When it drops to the corresponding value, stop its evacuation.

After this, when another passenger gets on board and the vehicle load increases, the height adjustment valve 5 operates to supply air, and the spring chamber 8
When the air pressure in the spring chamber 8 rises to a value corresponding to the vehicle load at that time, the air supply is stopped. At this time, the solenoid valve 11 maintains the block position 11a.

By supplying and exhausting air to and from the spring chamber 8 as described above, the height of the air spring 4 is kept substantially constant, and the height of the entrance/exit with respect to the stationary platform is maintained substantially constant.

When the door switch 12 is turned OFF to close the entrance door after boarding and exiting, that is, when a door close signal is issued, the solenoid valve 11 is demagnetized and returns to the communication position 11b, and the auxiliary compartment 10 communicates with the spring chamber 8 again. Therefore, after the vehicle load is determined, the height adjustment valve 5 again operates to supply or exhaust air according to the determined vehicle load, and the air spring 4 returns to its normal spring characteristics, and the air spring 4 returns to its normal spring characteristics. Air spring characteristics are ensured.

In the above embodiment, the opening signal and the closing signal for the entrance/exit door are transmitted to the door switch 12 which is operated by the conductor.
Although this is assumed to be obtained by ON/OFF operation, the ON/OFF of a detection switch such as a limit switch installed in the opening/closing device that drives the opening/closing of the entrance/exit door and detects whether the door is actually open or closed.
It may also be obtained by OFF operation. In any case, the opening/closing signal for the entrance/exit door is passed through each vehicle in the train formation, and can be easily used in any vehicle.

[Effect] As explained above, according to the present invention, the auxiliary chamber is isolated from the spring chamber by the switching valve based on the opening signal of the entrance/exit door, and this disconnected state remains until the closing signal of the entrance/exit door is issued. As a result, air supply and exhaust is not performed to the auxiliary compartment while passengers are disembarking the vehicle and subsequently boarding the vehicle, that is, while the vehicle load is changing. A conventional example in which the auxiliary chamber is always in communication with the spring chamber because the valve communicates the auxiliary chamber with the spring chamber, and after passengers have boarded and exited the vehicle, that is, after the vehicle load has been determined, the auxiliary chamber is also supplied with air. Compared to this, the consumption of pressurized air is reduced without compromising the inherent advantages of air springs. This reduction in consumption leads to the use of a compressed air source that is small and has a small discharge capacity, and also leads to a reduction in noise during exhaust, since the amount of air exhausted to the atmosphere is small.

Furthermore, according to the present invention, the following unique effects can be obtained.

Another technique using the technical means of the present invention is disclosed in Utility Model Application No. 45111/1983 (Utility Application No. 141768/1983). However, this is an earlier application that was filed before the original filing date of the present invention and published after the original filing date of the present invention, that is, an earlier application that became publicly known after the original filing date of the present invention.

This is a system between the main air chamber (spring chamber) and the auxiliary air chamber (auxiliary chamber) that isolates the auxiliary air chamber from the main air chamber when the pressure in the main air chamber is below a predetermined value. The air conditioner is equipped with an on-off valve (switching valve) that communicates the auxiliary air chamber with the main air chamber when the auxiliary air chamber is larger than a predetermined value. The technical idea that is the original purpose of this other thing is that when the main air chamber is at low pressure, the auxiliary air chamber is shut off to reduce the internal volume as an air spring chamber, and when the main air chamber is at high pressure, By communicating the secondary air chamber and increasing the internal volume as an air spring chamber,
This stabilizes the air spring characteristics while the vehicle load fluctuates.

If we consider this other method as another means of reducing air consumption in a railway vehicle in the same way as the present invention, when the vehicle stops at a station, the load on the vehicle is first reduced by passengers getting off the train. Even if the air pressure decreases, if the amount of decrease is small, the pressure in the main air chamber may be higher than the predetermined value, and in this case, the on-off valve is in the open position and communicates the sub air chamber with the main air chamber. Not only the main air chamber but also the auxiliary air chamber are exhausted, and the opening/closing valve is closed only when the pressure in the main air chamber decreases to a predetermined value or less due to this exhaust air. In addition, when the vehicle load increases due to another passenger getting on board, air is supplied to the main air chamber, but even a small amount of air supply may cause the pressure in the main air chamber to exceed a predetermined value. When the predetermined value is exceeded, the on-off valve opens to communicate the auxiliary air chamber with the main air chamber.

That is, according to this other means, whether the auxiliary air chamber is communicated with the main air chamber or cut off by the on-off valve depends on whether the pressure in the main air chamber is greater than a predetermined value or less than a predetermined value. Even when passengers are disembarking from and boarding the vehicle, that is, the vehicle load is changing, the sub-air chamber is in communication with the main air chamber. In addition, when using this other means, the pressure value of the main air chamber is used as the element to open and close the on-off valve, so a means (pressure sensor) to measure the pressure of this main air chamber is required, and the railway vehicle If we apply this alternative method to
A new pressure sensor must be installed in each car in the train set.

On the other hand, according to the present invention, whether the auxiliary chamber is communicated with the spring chamber or not is determined by the closing signal of the entrance/exit door.
It is based on the opening signal, that is, the switching valve isolates the auxiliary chamber from the spring chamber in response to the opening signal of the entrance door, and this disconnected state is maintained until the exit door close signal is issued, so that passengers cannot board or exit the vehicle. The auxiliary chamber is not communicated with the spring chamber at all during the vehicle load change. Therefore, the present invention has a greater effect of reducing the amount of compressed air consumed than the above-mentioned other means.

In addition, the present invention uses the opening/closing signal of the entrance/exit door as the element for switching the switching valve to either the communicating position or the blocking position, and this opening/closing signal is originally provided in every car in the train set. Because there are
This is easy to utilize, and there is no need to add a new pressure sensor to each vehicle as in the other method described above.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional example. 4...Air spring, 5...Height adjustment valve, 8...Spring chamber, 9...Passway, 10...Auxiliary chamber, 11...Switching valve (electromagnetic valve), 12...Door switch.

Claims (1)

[Scope of Claim for Utility Model Registration] An air spring having a spring chamber and an auxiliary chamber connected to the spring chamber; and an air spring connected to the spring chamber of the air spring, which supplies pressurized air to the spring chamber when the vehicle load increases, and a height adjustment valve that discharges pressurized air from the spring chamber when the load decreases; and a block position that blocks the connection between the two ports in response to an opening signal of the vehicle entrance/exit door; A 2-port, 2-position switching valve is provided with a communication position for communicating between the two ports in response to a door close signal, and one of the two ports of the switching valve is connected to the spring chamber, and the other is connected to the spring chamber. An air spring device for a vehicle, characterized in that: is connected to the auxiliary chamber.